I have recently switched to FCP from a PC Avid editing world. To start the switch small I went with a base model Imac to test the waters first. I am used to using some pretty large raids but of course on the Imac my storage options are very slim. The best option of course is FW800. What I have noticed however is that these days it is pretty common for a single SATA drive to run at 120MB/S + when empty and only drop to about 80 MB/S when close to full. Given that FW800 usually caps out around 80MB/S is there really any logical reason to use a 2 drive raid-0 unit? I know with ESATA I would see a clear advantage but with FW800 the single drive seems like it would work just as well given the 80MB/S cap. Thanks for any input.